XML 76 R53.htm IDEA: XBRL DOCUMENT
v3.19.3

Investments - Components of the net unrealized gain on securities that is included in AOCI in the Balance Sheet (Details) - USD ($) $ in Millions | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Unrealized gain on: |  |  |
Pretax |  | $ 1,165 | $ 105
Deferred Tax |  | (245) | (22)
Net |  | 920 | 83
Total fixed maturities |  |  |
Unrealized gain on: |  |  |
Pretax |  | 2,169 | 160
Deferred Tax |  | (456) | (34)
Net |  | 1,713 | 126
Fixed maturities — annuity segment |  |  |
Unrealized gain on: |  |  |
Pretax | [1] | 1,777 | 101
Deferred Tax | [1] | (373) | (21)
Net | [1] | 1,404 | 80
Fixed maturities — all other |  |  |
Unrealized gain on: |  |  |
Pretax |  | 392 | 59
Deferred Tax |  | (83) | (13)
Net |  | 309 | 46
Deferred policy acquisition costs — annuity segment |  |  |
Unrealized gain on: |  |  |
Pretax |  | (760) | (42)
Deferred Tax |  | 160 | 9
Net |  | (600) | (33)
Annuity benefits accumulated |  |  |
Unrealized gain on: |  |  |
Pretax |  | (259) | (14)
Deferred Tax |  | 54 | 3
Net |  | (205) | (11)
Unearned revenue |  |  |
Unrealized gain on: |  |  |
Pretax |  | 15 | 1
Deferred Tax |  | (3) | 0
Net |  | $ 12 | $ 1
[1] | Net unrealized gains on fixed maturity investments supporting AFG’s annuity benefits accumulated.

X
- Definition Accumulated other comprehensive income loss available for sale securities adjustment deferred tax and non controlling interest. + References No definition available. + Details
Name: | afg_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentDeferredTaxAndNonControllingInterest
Namespace Prefix: | afg_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Accumulated other comprehensive income loss available for sale securities adjustment, pretax. + References No definition available. + Details
Name: | afg_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentPretax
Namespace Prefix: | afg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition unrealized gain on securities, included in Accumulated Other Comprehensive Income. + References No definition available. + Details
Name: | afg_UnrealizedGainOnSecuritiesIncludedInAccumulatedOtherComprehensiveIncomeAbstract
Namespace Prefix: | afg_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount, after tax, of accumulated unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=118930883&loc=d3e681-108580 + Details
Name: | us-gaap_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_FixedMaturitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=afg_FixedMaturitiesAnnuitySegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=afg_FixedMaturitiesAllOtherSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=afg_DeferredPolicyAcquisitionCostsAnnuitySegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=afg_AnnuityBenefitsAndOtherLiabilitiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=afg_UnearnedRevenueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |